[antlr-interest] Excaping quotation characters in quoted strings - javascript target
Jim Idle
jimi at temporal-wave.com
Mon Jul 27 10:06:23 PDT 2009
It is probably the code in JavaScriptTarget.java that deals with
converting ANTLR escapes to the trget language. Copy the methods from
Target.java. Is nyone maintaining this target?
Jim
On Jul 26, 2009, at 6:52 PM, James Robson <james.robson at ymail.com>
wrote:
> HI, I'm trying to allow escape sequencs in quoted strings using the
> java script target.
>
> I've a similar implementation using the Java Target which works
> without any problems. It seems that the ext is not available when
> using the javascirpt target.
>
> Does anyone know how this could be solved for the javascript target?
>
> Below are the lexer rules:
>
>
> TEXT
> @init{var lBuf = "";}
> :
> QUOTATION_MARK
> ( escaped=ESC {lBuf = lBuf.concat(this.getText());} |
> normal=~(QUOTATION_MARK|'\\'|'\n'|'\r') {lBuf =
> lBuf.concat(String.fromCharCode(normal));} )*
> QUOTATION_MARK
> {this.setText("\"".concat(lBuf, "\""));}
> ;
>
> fragment
> ESC
> : '\\'
> ( 'n' {this.setText("\n");}
> | 'r' {this.setText("\r");}
> | 't' {this.setText("\t");}
> | 'b' {this.setText("\b");}
> | 'f' {this.setText("\f");}
> | '"' {this.setText("\\\"");}
> | '\'' {this.setText("\'");}
> | '\\' {this.setText("\\");}
> )
> ;
>
> QUOTATION_MARK
> : '"'
> ;
>
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